NMAC PA28 AND B737 NEAR FIM; CA.

Narrative

IN SUM: ARTICULATE AND WELL DOCUMENTED ACCOUNT OF A VERY CLOSE NMAC IN VICINITY OF SIMI VALLEY; CA; DURING EARLY EVENING HRS RPTED BY THE PLT OF A PA28 ACFT EQUIPPED WITH IMC CAPABILITIES AND MODE C XPONDER AND THE OTHER ACFT; AN ACR B737; DSNDING INTO THE LAX AREA. THE ACR FLC NEVER BECAME AWARE OF THE NMAC FROM ANY SOURCE UNTIL CONTACTED BY THE ALARMED RPTR AFTER THE INCIDENT. THE RPTR CALLED ATC NEAR THE TIME OF THE EVENT AND REMAINS DISMAYED AT THE LACK OF COOPERATION AND ATTITUDE OF THE CTLR CONTACTS. THE RPTR DID CONTACT THE CAPT OF THE B737 AND WAS ABLE TO RELATE THE INCIDENT AND PROVIDE GPS TRACK INFO FOR THE TIME OF THE EVENT AS NEEDED. THE RPTR MAKES CONSTRUCTIVE SUGGESTIONS AND COMMENTS AS TO THE POSSIBLE RESOLUTION AND PREVENTION OF FUTURE SUCH EVENTS. THESE SUGGESTIONS REVOLVE AROUND EDUCATION AND MODIFICATION OF JET ARR/DEP OPS INTO AND OUT OF THE CONGESTED LAX AND SOUTHERN CA COMPLEX. THE INCIDENT TOOK ABOUT 3 SECONDS FROM START TO FINISH AND THE DISTANCE ESTIMATED AT 75-100 FT BTWN THE 2 ACFT INVOLVED.